Hi, I have a numark dxm01 mixer, when i raise the volume on one of the channels there is a noise that resembles radio interference. I've tried cleaning the leads and altering the volume on the amp but it seems to be picking up backround noise from somewhere. I wonder if one of the connections inside have come loose which results in this noise. It doesn't happen on channel 2.
Thanks,
Ste Patterson

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I would need to hear it to be completely sure (does it sound a little bit like slow morse code?), but it sounds like what you're hearing is probably cell phone interference. Certain cell phones are more likely to cause it (anything with PTT capability) because of their transmitter power, but any cell phone close enough to the receiver could give you grief. If you're playing in unpredictable places, try to get the antennae well overhead of the audience, with a straight shot to the transmitters, and as close as is reasonably possible.

I've tried using the balance for left and right speakers, and when the receiver is acting up with the right speaker having a low volume, I tried moving the balance all the way over to the right speaker. The right speaker volume will not increase in volume but the left speaker will decrease in volume.

Just to clarify, the center and the rear speakers are balanced. The issue only happens sometimes when I first power on the receiver I will have no center channel. If I leave everything alone for a few mins, the center channel will come on.

So it seems to me that something one the receiver is going. The question is, can anyone suggest a physical repair for the receiver for these symptoms?

Remove the face plate of the mixer (7 Philips screws) and remove all the knobs and any pot retaining nuts. The you will then be able to get access to the fader to replace it. Any dramas, fell free to ask away

make system microprossesor reset according to your model.---try to make system reset by disconnection and connection.if all above failed bring a spray lubricant contact cleaner from radio shack and apply spray in volume and channel buttons,

please make all your fader down-all your rotary control at middle(12 oclock position)------all your pressed pushbuttons in up position--disconnect all inputs cables----use good new cables for outputs---bring a good mic and connect it to any channel and raise its fader up and main mix faders up and check if the problem solved check your cables and your pressed button if not better to contact a good service center.

Generally, crackling noises come from anyplace there is a mechancial connection for the sound signal. The volume control, main/remote speaker switch and possibly the headphone jack. That is where the contacts must be cleaned, but it requires dissassembly. Try operating the main/remote speaker switches, and plug/unplug a headphone several times. I am assuming there is still audio behind that crackling. Are you using both main and remote speakers simultaneously?